i965/query: Set Ready flag in gen6_queryobj_get_results().

i965/query: Set Ready flag in gen6_queryobj_get_results().

q->Ready means that the results are in, and core Mesa is free to return
them to the application.  gen6_queryobj_get_results() is a natural place
to set that flag; doing so means callers don't have to.

The older non-hardware-context aware code couldn't do this, because we
had to call brw_queryobj_get_results() to gather intermediate results
when we ran out of space for snapshots in the query buffer.  We only
gather complete results in the Gen6+ code, however.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>